Gear-cutting machine.



7 SHEETS-SHEET I.

w -rI s.. SUNQERLAND. v GER CUTTINGMACHINE.

APPLICATION FVILED JAN-27, 1913.

S. SUND'fERL'AND.v GEAR CUTTING MACHINE.) APPLICATION FILED JAN-27,1913.

Patented June 13, 1916.`

7 SHEETSj-SHEET 3- |Il`IIll\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ vls.-suN'DR|.Al\1D. GEAR CUTTING MACHINE. APPLICATION FILED JAN-27,1913.

* Patented June 13,119176.v

l 7 SHEETS-SHEET.

8, SUNDERLAND.

, GEAR CUTTING MACHINE APELICATION FILED 1\N.21.19'1`.`I 1,187,200,

Patented June 13, 1916.

7 SHEETS-SHEET 6.

S.SUNDERLAND.

GEAR CUTTING MACHINE. AP'PLxcATloN- ruf-:D 1A'N.`27.1913.`

Patented nine 13, 1916.

'.7 SHEETS-sinner 1.

awa j v [1m/25011 mda Miam.

T l SALES SAM SUNDERLAND, or KEIGHLEY, ENGLAND.

enna-CUTTING MACHINE.

To all 'whom t may concern Be it known that I, SAM SUNDnRnAND, a subject of the King of Great Britainnand Ireland, and resident of High Utley, Ke1ghley, in the county of York, England, have 1nventeda vnew and useful Improvement in and Relating to Gear-Cutting Machines, of

which the following is a'specification.

fore the cutter is slid into engagement with the wheel blank,'and to rotate the spacing or dividing wheel and blank during the cutting of the wheel teeth in an effectivemanner.v l

In describingmy invention in detail, reference is made to the accompanying drawings', in which- Figure 1 represents the front elevation of a gear cuttingmachine vto which myinvention is added. Fig. 2 is a side elevation.4 Fig. 3, a back elevation. Fig. 4, a plan of the machine. F 4a is a fragmentary elevation on the line 7 7. of Fig. 4 looking in the direction of the arrows. Fig. 5 is an enlarged sectional detail ot'- aA 'clutch mechanism. taken on the vertical line lie-5 of Fig. 1. Fig. is an enlarged detailed view with parts in section; the line (3 6 and arrows in Fig. 4 indicate the location of this View Yin the organized machine. Fig. 7- is a detailof theV sliding clutch shown by Fig 3, drawn to a larger scale. and being shown in elevation with parts in cross section.- Fig. 8 repf resents details of a lever 69, seen in side, end elevation and plan views 'respectiyely Fig. l) is a detail taken on line 9-9 on Fig. 5.. Fig. 10 is an enlarged plan view'of a part of the clutch mechanism shown in Fig.

5; Fig. 11 is a detail view showing the change wheels lV and lV2` on shafts 77 and 7S and their intermediate gearing; Fig. 12 is a detail showing the change wheels VQ'WY on shafts 51, and 53 and their intermediate gearing; Fig. 13 is an enlarged detail showing the head stock'carrying'the cutterwith the latter4 in operative engagement with a wheel blank; Fig. 14 is an enlarged detail Specification of Letters latent.

provided with ay mandrel what is generally vnut of the saddle,

. bracket l7, said.

'being to some ofv the release latch and clutch meehanisin` 'I Patente-a Jungle, 1916.-- f Appneation med January a7, 191s. serial No. 744,501.

shown in Fig. 6; Fig. 15 is an 'enlarged de tached detail of the levers and .mechanis'm- Vutilized. for controlling the sliding'andverhead stock; Fig. 16 is a .Fig 17.v is a plan ofthebelevers. Fig. 18 is a detached .A

tical movements of plan of same.`

fore mentioned view of one of the levers.

formedupon which is seription,

viding wheel 3, the opposite end of the mandrel being suitably adapted to support wheel A screw 5 engages with a threaded so that on rotating the blanks. l

screw, the saddle maybe moved Yto the .position to suit .the .diameter of wheel blank 4,'

suoli as shown by' plan view. Vertical guide' 'ways 6 form-part ofthe gauntree, and en-` gaging with these guide ways is `a platel plate being provided with:

horizontal guide ways 8,-in which is mounted the headstock 9, said Ibracket vand headstockconvenient manner, such Shown.

The bracket and headstock are controlled in their In carrying out my' invention, a' `gauntree 1 placed a saddle2, of the ordinary ,d to one end of which "is secured' termed the spacing or c li- 1 eXte'nt counter-balancedin y i as bye; weight 10 as Yertical movements .by a threaded bar 11 made to revolve in'fboth directions, *i

` slowly when the plate bracket and'headstock Y quickly when lowering; f

vslide 12,'and cutter K, being slidtoward the y wheel blank for cutting the teeth, and withare rising, and more .the headstock along with the reciprocating drawn therefrom for allowing the headstock -f i' and cutter to descend. I ,A The reciprocating plate 12,.to whichA a cut ter K of the usual description is attached, is Y mounted in. guideways 13 formed. in the;A front plate of headstock, said plate and-atA y tached cutter being reciprocated by geared connections with the step pulley 14, throughy bevelwheels 15 and'15A,-vertical shaft 16, worm 17 and worm wheel 17A, see' Fig; 3; N

Upon shaft 16, isf feather keyed the hub of bevel wheel 15A, said hub passing thrbugh boss B, and tothe upper portion of the hub y'is keyed a worm 40. The worm 17 is by preference integral with shaft 16, said worlnv. gearing with worm wheel 17A keyed'to one g end of shaft 18, mounted ing formed Von plate bracket .7.' At the 0pina suitable bear#v y posite'end of shaft 18, a long 'toothed pinion 19 is formed, see Figs. 2 and 13,A and is geared with a' spur wheel 20, from the face of which projects a stud A, carrying a block21 engaging with the vertical slot 22 gauntree 1 to which it is bolted in the position to suit the diameter of wheel blank 4. The headstock 9.oarrying the reciprocating plate and attached cutter Kof the rack type, is moved in the horizontal guide ways 8 formed in the plate bracket 7 toward and away from the wheel blank 4. When thel headstoc'k 9r is in the forward position for the lcutter K to engage with and cut the teeth in wheel blank 4 the headstock 9 along with the reciprocating cutter K are moving' upward and during such'movement, the dividing wheel 3 is causing the blank 4 to beA rotated in the direction corresponding to the upward movement of said cutter, therate of rotation of blank 4- at what is known as the pitch line of the teeth being cut, is the same as' the upward movement of the headstock 9 and cutter K.

When the headstock 9 and reciprocating 'cutter K, have been raised to the desired height, they are slid backward in the guide ways 8, a distance for the cutter to be clear of b'lank 4. During such clearance the head- 'stock 9 is lowered by the reversal of rotation of the threaded bar-11, operated as hereinafter described.

'The rotary motion, controlling the slid-l ing of headstock 9, and the starting, stopping and extent of the vertical movement of said headstock, also the rotation of the divided wheel 3, and wheelblank, is obtained from a source independent of step pulley 14.

7 Upon a fixed stud is mounted a rotating pulley P, attached to a spur .wheel 23, said wheel gearing with a wheel 24 keyed to one 'end of shaft 25, to the opposite end ofwhich is secured a toothed clutch 26, with which the sliding clutch 264,-free on shaft 25,- is allowed to engage periodically, the last named clutch beingprovided with an angular projecting stop piece 27, see Fig. 7.

The sleevev of clutch 26A 4engages with the sleeve 28 of spur wheel 29 which is attached to bevel wheel 29A, the bevel wheel gearing with a like wheel 30 keyed upon'they vertical shaft 31, to the upper por-tion of which is feather keyed a bevel pinion, 32 4gearing with bevel wheel '33 of double the diameter of pinion 32. This bevel wheel 33 is keyed upon a horizontal shaft suitably supported, andv to the opposite end of said shaft, is seycured a disk plate 33A, see Figs. 3 and 4,

fromthe face of which projects `a crank pin 34, said pin supporting a block 34A, placed within a vertical slot formed in the rear portionof headstock '9, mounted in the horizontal guide Ways 8 o'f plate bracket 7.

revolution, thereby causing the headstock 9 the reciprocating plate, and the attached cutter K, to advance toward or recede from the wheel blank on each half revolution of crank pin 34.

The controlling of the engagement and disengagement of the clutches 26 and 26A, is effected by the operation of the' levers 67, 68 and 69, shown by Figs. 5 and 8. These levers are not shown by Fig. 3, in order to more clearly illustrate the location of the clutch mechanism behind, hereinafter referred to. ,y

The worm wheel 39, sf Figs. 2 and 3, is rotated by worm 40, and on the shaft of said worm wheell is keyed a disk 39A, provided with a crank pin 41. Upon said pin` is mounted one end of connecting rod 42, the other end of which rod is carried by a pin projecting from lever y43, said lever being vprovided with a pawl 44, adapted to engage with the teeth of ratchet wheel 45, freely mounted on shaft 4G, supported by the machine fram'e, sec Figs. 3 and 6.

VThe end of ratchet wheell boss at 47, see

Fig. 6, isA cutA with clutch teeth, and upon shaft 46, is feather keyed a'sliding sleeve 48,'

cut with clutch teeth at both ends. Keyed upon shaft 46 is a spur wheel 49, gearing with a wheel 50, which is of half the. diameter of said'wheel- 49 land is secured ,to shaft 51, see Figs.'3 and 4, by which the change wheels W shown by Fig. 12, are rotated.

The wheel 50 is secured to end'of shaft 51, and another ofthe change wheels W! secured to the end of shaft 53, the intermediate-change wheel being carried byan ordi nary stud plate 53A, in the usual manner. To the other end. of shaft 53 is keyed a bevel-wheel'54 geared with a bevel wheel 55,

secured on the vertical threaded bar 11, see.,

Figs. 1 and 2.

By the rotation of these wheels, first in one direction and' then in the other, the vertical sliding movements of the headstock and cutter are effected in accordance with the composition of the said change wheels.

Upon the inner-'end of shaft 46, see Figs. 6 and 14, is freely mounted a worm wheel 56 rotated by worm 57A, operated by the intermediate spur wheelsgearin'g with the constantly rotating spur wheel 23 actuated by pulley P. The boss on one side of worm wheel 56 is provided with 'clutch teeth, the

other boss of wheel extends into a recess formed in the outward swell 1A of gaunt'ree; in thisrecess i'sa spiral spring C encircling Shaft 46, and in contact with the wheel boss and end of recess as shown. This spring acts as a cushion when the clutch teethat 57 are brought into gear. The operation of levers 67, 68'and bell crank lever 69 controls the reversible inotions of the threaded bar ll, headstock 9 and other portions of thernachine.

Bell crank lever '69 is supported by a fixed l stud 70, see Fig. 5, and upon stud '70A prorotating clutch 20, turning spur. wheel Q9' jecting from bell crank lever a lever (i8 is mounted, provided with auhook (S8A at one end adapted to engage lwith a notch cut in the top side of lever 67, in a manner so as to retain said lever in its raised position asshown by Figs. 5, 15 and 17, the periodic raising of lever 67 being effected on the curved side of tappet 66 engaging lwith the lever. V

When lever G7 is raised by pivoted tappet 66, Figs. 5, 9 and l0, the clutch 26A is alloWed to slide into gear with the constantly and bevel Wheel 29A, onerevolution, and by wheel 29 gearingivith spur ivheel ot double diameter, said spur Wheel and attached circular cani 3G make one half of a revolution; vertical' shaft 3l makes one revolution, disk plate 33A one half of a revolution' and the headstock 9 is caused to,A

slide horizontally a distance suilicient ,to Withdraw the cutter K from, orto engage with blank 4.

The rotation of -circular cam'fl, .one half.

' on which spur wheel 4!) is secured. Ho long as these teeth at 47" are in gear. shaft -lll and spur wheel 4f) are operated. and the threaded "bar l1 rotated in the direction 'for raising headstock 9, for removing any back lash from the geared wheels operating threaded bar l1, before each series oiE cuttings cominence, and during thev cutting ofthe teeth.

The control of the sliding clutch 26^ is effected in the manner as hereiribe'l'ore dc- Scribe-d. and on said clutch again engaging `with the-constantly rotating clutch 26,

. spur' wheel 35' and circular cam 30 make another halt oi" a'l revolution, causing the, surface 36A ot circular cam-wliich is at the greatest' distance from the center ot cani,-

tc engage with roller-37 and force pendulum lever 38a suliicient distance from the center' of earn to cause the clutch teeth at 47 to disengage, and those at the opposite end of slidingsleeve 48, to be brought into' gear 4With `those of the rotating worm Wheel 56,

` ivhere they are retained for a short periodV bythe hookedcatch 7l of lever 714 secured Aon shaft 72, said catches being forcedv into engagement by the expansion of compressed Y spring 73 mounted near the bottom of lever 71A, see Fig.' 14. xDuring suehengagement of the hooked catches,y the rotation of shaft 46 and threaded bar ll are reversed and the. speed accelerated by worin Wheel 56thereby quicklyloivering the headstock 9` and reciprocating cutter K, which isthen clear of blank.

ylVhen the rotation of shaft 46 andgea'red 1 connections are reversedas last indieatedfor lowering the headstoc'k,l the clutch 60A is sliding in the vopposite direction to that shown by the straight arrow in Fig. 45, and

yso

on the projection 66A of said clutch engagf ing with and'depressing the end of leverl 71B secured on shaft 72, the catches at .71 are allowing spiral springBSB to contractjand operate said `lever and therefore sliding' sleeve 48, so that the clutch teeth at 47 arey brought into gear, by which the rotation of threaded bar 1l is reversed for a period sufT ticiently long to remove any back lash there may bein the toothed wheels 49 and thread ed bar 11, before the cutter K eng-ages with the Wheel blank L. lVhen the 'pendulum le-f ver is thus liberated', rollerI 37 thenengages with the indent adjoining 36A of circular` cain 3G, and onthe sliding clutch 26A and spur `wheel l29 inaking another `revolution on the operation otlevers (57, 68 and (fhthe circular cani 36 is rotated one halt of a revolotion.. the froller 37 passing over the circu-y lar path 36", which vis suiiciently prominent to withdraw the clutch teeth` at 47 out' of gear. During this disengagement of the clutch teeth at 47', the vertical shaftll'inakes one revolution', aiid'crank pin 34 one half ot a revolution in the direction to advance the lieadstock to the position tor the cutter l( to engage ivith the wheel'blank, and on arriving in that. position, the circular cam 36 will he-in the position to allow roller 87 to eii'gagc with indent. flo". allowing clutch teeth Vat 47 to engage and the headstock andreciprocating cutter to be raised a distance equal tothe pitch of the gear being cut in blank 4, land on the headstock arriving rat the top ot' its vertical movement,`t he before mentioned operations are repeated.

rl`heshatt 51 is rotated by Wheel 50 gearing with wheel 49, and keyed to the inner end oi shat't 5l, see Fig. 5, is a clutch (S0 provided with longilfidnal projections and recesses of the ordinary construction, simi-` lar to those at 28, shown,r by Fig. 7. These,..-

projections Vengage `with correspondingfr'ecesses' formed in the clutch GOA, vwhich is mounted upon a threaded boss Gl, rigidly se;l cured to the machine frame.` Through this ,threaded boss is freely passed a, shaft 62,

e5 disengaged and. pendulum lever 38 liberated,`

upon which is keyed a circular block 63 provided with a latch ended yielding bar 6l, so

the direction indicated by the arrow-in Fig.

5, the tappet 66 engages with 67A of lever v67 raising said lever, and operating levers 68 and 69 thereby allowing sliding clutch 26A to rotate one revolution, and 'circular cam 36, Fig. 6 one half of a revolution, by

which operation the clutch teeth 47 at one end of sleeve 48 are disengaged, and those at the opposite end of sleeve slide into mesh with the clutch teeth of worm wheel 56 ythereby reversing' the rotation of shaft 51,

causing the angular side of latch ended bar 64 to engage with the radial groove 65 cut in clutch '60, the angular side of bar allowing it to yield in the direction of straight arrow leaving Shaft 62 stationary, during which the threaded bar 11 is rotated -in the direction for lowering the headstock 9 and cutter K, t-he latter bein-g then clear of wheel blank 4. i

. .Lever 67 and bell crank lever 69 are both freely mounted on rigid stud 70, and .when

the notched end of lever 67 is' raised as descrlbed, leve 68 1s also raised. and being supported on pin 70A of bell crank lever 69.

the other'arm of bell crank lever is forced clear of the circumference of sliding clutch 26A and angular stop 27, th'us liberatingsaid clutch so that on the expansion' of com-u pressed sprmgs S, see Fig. 7, the clutch 1s,

forced into gear with the constantly rotatf ing clutch 26 for one revolution; this takes place each time lever 67 is raised.

On 'the angular projecting stop 27 coming in contact with the curvature at the upper portion of lever 68,'the catch at the lower and freeeend of said lever, is raised clear of lever 67, liberating same, allowing it to descend and the upper end of bell crank lever 69 to fall into contact 'with the eireumferenceof sliding clutch 26A, so that on it completing the revolution` and on the an'- gular stop 27 engaging with the inclined end of bell crank lever-.69, see Fig.k 7, the sliding clutch 26A is moved clear of the cone stantly rotating clutch 26.

On each rotation of sliding clutch 26A the. bell crank lever 69 liberates the stop piece 27 so that the clutch 60A will travel a predetermined distance in one or the other direction, and at the termination of each movement the tappet 66 will have engaged with the lever 67 for the purpose of controlling therotation of clutch 26A as before mentioned, the tappet passing through the indent in lever 67 without affecting its position.

`\Vhile the pivoted tappet 66 is passing through said indent, the headst-ock 9 is rising and the reciprocatingcutter K engaging with the wheel blank L1, but on the tappet engaging with the end portion GTA-of lever 67, bell crank lever 69 is operated and sliding clutch :26A liberated as before describedlallowing said clutch to make one revolution. During this revolution, shaft 51 is reversed, clutch 60A slid in the opposite direction'to that shown by straight ar-v row, vertical shaft 31 is also rotated and the cutter moved clear of blank l. at the same time. the clutch teeth at 57' are brought into gear with the worm wheel 56 as shown by Fig. 1l, causing the headstock to be lowered quickly.

The lowering of headstock 9 is stopped on the meshing of the clutch teeth at 47, by which the rotation of sleeve 4S is reversed. The clutch 60A is thenr moved in the direction opposite to that shown by the straight arrow in Fig. 5, and since as .previously stated tappet 66 is adapted to pass through the indent in leverl 67 it is not raised during,r this operation. VOn the projeetion 66A engaging with end of lever 71B, the catch 71 liberates. penduluinlever 38, causing the clutch teeth at L17 to mesh as before described.l

f By means of the latch ended bar arrange and operated .in the manner described, an intermittent rotary motion in-one direction only is given to shaft 62, upon which is keyed a bevel wheel 74 gearing with a like wheel 71A secured on shaft 75, see Figs. 1 and 5, and upon theopposite end of said shaft is keyed another bevel wheel 76 gearing lwith a like wheel-secured on Sha-ft l77, see Fig. To the end of this shaft is secured a change wheel W gearing through a like intermediate wheelcarried bv an ordinary stud plate 79, with the wheel W2` secured on shaft 78, see Fig. 11, said operating dividing wheel 3.

Shaft 7S is grooved for the greater part of its length, and feather keyed thereon is a worm 80, placed within a forked ree'ess formed between the shaft bearings of rigid arm 81. secured to saddle 2. the worm gear shaft ing with the dividing wheel 3 keyed on the mandrel passing through saddle 2, see Figs. 1 and 2.

The engagement of pawl A8:2 with the indent eut in disk S3, secured on shaft 62, preventsthe rotationof said shaft vother than when the dividing wheel 3 is operated dur` ing the cutting of theteeth in wheel blank.

VTheoperation of the machine is as fol- 1,187,200. Y f ha lows :-The .wheel blank `4 mounted upon mandrel 2, is, intermittently rotated at. a speed equal-to that of the rising cutter K, during the cutting of teethV in said blank.

The reciprocation of said cutter is derived.`

from step pulley 14, 'through bevel wheels and 15A,vertial shaft 16, worm and worm wheel 17A, pinion 19 and' spur wheel 20, provided with a 'studl20A and block 21,

the ,latter engaging with slot 22 in plate 12,

so that on the rotation of spur wheel 2O and stud 2'1, plate12 to which cutter K is suitably attached, is caused to reciprocate. The

. pulley P imparts motion to pinion 23, and

other portions of the machine, said pinion gearing with spur wheel 24 securedon shaft 25 carrying clutch 26, is constantly rotated by said pulley. The spur -wheel 24 through a train of gears and worms 57A, 'rotates worm wheel 56, provided with clutch teeth4V engaging periodicallywith like teeth 57 at lone end of sliding sleeve 48'. When .these clutch teeth` are in mesh, the headstock 9 and cutter K are lowered quickly, the cutterA K being thenl clear of wheel blank.

The horizontal sliding movement of head-` stock 9 and cutter K, is eected in each direction on vthe engagement of thefsliding clutch 26A with the fixed and constantly rotating clutch 26.' When these clutches are in mesh, clutch 26A is allowed to make one revolution only and operatespur wheel 29 andbevel wheel' 29A in like manner.

bevel wheel meshes'with wheel'30, and op-l The erates through vertical shaft 3l, and wheels 32 and 33, the disk plate 33A and pin 3,4, one half of a revolution, see Figs. 3 and 4, thereby causing the headstock and cutter to slide toward or away from the wheel blank The sliding clutch '26A is brought into mesh with 26, and rotated one revolution on y each operation of levers 67, 68 and 69, and

p the rotation stopped on the'engagement of angular projection 27 with-end ofbell crank lever 69, see Fig. 7. On eachrotationof vsliding clutch 26A and spur wheel 29, circular cam 36 makes one half ofV a revolution causing pendulum lever 38 vto swing on its 'supporting stud, and slide sleeve 48 in one direction or the other. l When the clutch teeth at 47 are in mesh, 'the headstock 9 and cutter K are 'raised by the rotation of y threaded b ar 11, operated through spur wheels 49 and 50, and `change wheels W1 shown by Fig. 12. "When `the threaded bar is thus rotated, -the reciprocating cutterK isacting on the teeth of wheel blank 4, but on the levers 67, 68 and 69, being again operated, circular cam 86 is rotated another half revolution, and sleeve 48 slidA so that the clutch teeth at' 57 are in mesh, by which i' the headstock and cutterv are lowered on the reversal of rotation of shaft 46 and gears connected with .threaded bar 11.. When A these arelowered the lesired distance, peny dulum lever 38 is released on the withdrawal A of'c'atch 71, lig. 14, fromv engagement with said. lever, allowing spring 38B to contract and cause sleeve 48 to slide in the direction to bring the clutch teeth at 47 into mesh.

The operation of levers 67, 68 and 69, and the rotation of cam 36, is controlled'by the positionr of lever 67, when it is raised bypivoted tappet 66 engaging with -the underside of lever, lever 68 engaging with lever 67 as shown by Fig;- 5 is .also raised, and being pivotedat 70.A to one 'arm of bell crank lever 69, theother arm of said lever is 'moved clear ofv stop piece 27, thereby allowing clutch 26A to slide intomeshA with clutchV 26 for one revolution Aand rotate the connected wheels.,

The clutch 60A carrying tappet .66 Vis Y i moved. to the right and left in accordance. with the rising and lowering of the headstock 9, the said tappet on engagement with lever 67 raising same,and thereby liberating clutch 26A to slide into mesh with the rotating. clutch v26, allowing clutch 26A to make .I

one revolution 0n keach raisingof lever- 67, the indent cut in the-underside of said lever allowing the tappet as it revolves topass through same without aecting'the 'position of lever.

What I claim isz-f 1. A gearplaning and generating machine, comprisingin combination an adjustable saddle plate, a spindle thereon adapted to carry awheel blank, a movable headstock, a non-rotating reciprocating cutter carried thereon, means for adjusting Isaid saddleyplate to aiixed position, means for movin/gf said headstock horizontally toward and /away from the wheel blank, means. for

fheadstock, means cooperating with Asaid raising and lowering means for moving said headstock horizontally toward and away from said 'wheel blank, meansvfor holdingf said saddle plate in a iXed position and means for intermittently rotatingA said wheelblank-with it's spindle simultaneously withvtheupward vertical movement of the headstock, substantially as described.

3. A gear planing and generating 'machine comprising in combination an adjustable saddle plate adapted to be set in a yfixed position, an intermittently rotatable wheel blank 'supported thereon, a vertical threaded shaft, adapted to rotate in either direction, a headstook movable on said shaft, a .reciprocating cutter carried by said headstock, means for rotating said threaded shaft slowly in one direction to cause the headstock to rise and means for rotatingl said shaft rapidly in the reverse direction to lower said headstock, an automatically operated sliding clutch for alternately' c011 meeting said shaft with one or the other of saidmeans, means for causing the headstook to move horizontally toward and away from saidwheel blank and means for imparting 15 a rotating movement to `said Wheel blank simultaneously with the upward movement of said headstook, substantially as described.

In witness whereof, I have hereunto set my hand in the presence of two subscribing 20 witnesses.

SAM SUN DERLAN D.

'lVitnesses WVM. IIhiLINGWoR'rH, JOHN GILL. 

